PW-CE2 E PWE3 – 58th IETF 10 November 2003 Yaakov (J) Stein

PW-PE2-E PW CE CE IWF PE PE IWF PSN In standard PWE “Edge to Edge” means “PE to PE” PW CE native service native service CE IWF PE PE IWF attachment circuit attachment circuit PSN

PW-CE2-E PW CE IWF PE PE IWF CE PSN Alternatively “Edge to Edge” could mean “CE to CE” PW CE IWF PE PE IWF CE attachment circuit PSN attachment circuit

Pros & Cons PW-PE2-E migration to PW doesn’t require customer upgrade single (large) IWF serves multiple customers service provider responsible for IWF PW-CE2-E Ethernet access may be cheaper easier to provide many different services customer responsible for IWF suitable for enterprise scenarios

Questions PWE3 Charter states does this rule out PW-CE2-E ? Service providers are seeking to offer multiple services across a common packet switched network … From the customer perspective, the pseudo wire is perceived as an unshared link … of the chosen service does this rule out PW-CE2-E ? if so, can we fix it when we re-charter? PWE3 architecture draft figure 2 (PWE3 Network Reference Model) is specifically PW-PE2-E do we want to modify this ? do we want to define 2 scenarios?